A GRIEVING father has backed calls for a public inquiry into the London bombings that claimed his daughter's life.

John Targett wants to know why security services failed to track two of the 7/7 bombers who had earlier been caught on camera meeting members of another terrorist cell who were under surveillance.

His daughter, mum-of-two Marie Hartley, 34, was killed when a bomb detonated by Hasib Hussain ripped through the number 30 bus at Tavistock Square nearly two years ago.

Two of Hussain's accomplices, Mohammed Sadique Khan and Shehzad Tanweer, had been filmed meeting the fertiliser bomb plotters, who were convicted last week, but MI5 failed to keep tabs on them.

The error allowed them to go on to kill 52 people and injure 700 more when they bombed the London transport system.

Mr Targett, of Dill Hall Lane, Church, said: "It doesn't surprise me that families of the people who were killed and horribly maimed in this atrocity want to know if it could or should have been prevented.

"Obviously we've talked among ourselves and I think there ought to be an inquiry. If mistakes have been made we want to avoid them in the future. But we are aware that it's not going to bring our daughter back.

"The emergency services responded magnificently to the tragedy but everything else has been a whitewash.

"We were told after 7/7 that these people had come out of the blue, that they were clean shirts and they had no connection with other terrorist cells.

"But now it has been proved they did. They should have been under the biggest microscope the Government could buy.

"If they can spend billions on a war in Iraq and Afghanistan surely they can spend money on protecting people in this country.

"If it was a cost issue there should be a huge inquiry before the same thing happens to other innocent people.

"Mistakes have been made and they should come clean and explain it to the public. Nobody has held their hands up. There should be an apology."

Mr Targett and his wife Barbara said the grieving process had been made even harder because every time the London bombings are discussed the media uses pictures of the mangled wreckage of the bus.

He said: "We will never have closure. There hasn't even been an inquest yet.

"It's terrible. You open the paper and there's a picture of the bus. Any reference to the bombings and it's always the bus that's shown because everything else was underground on the Tube.

"That's bad for us. It's very difficult for the family to cope."

Describing the bombers, he said: "I can't think of a word low enough to describe people like that. It's not even animal behaviour because animals only kill to eat."

Marie was in London in connection with her work at Hambledon Studios in Burnley.

She escaped the Tube explosions and texted her family to tell them she was safe, then she boarded the number 30 bus.

Last July Mr and Mrs Targett, Marie's husband David, of White Ash Lane, Oswaldtwistle, and eldest son Liam, nine, returned to the scene of the tragedy for a memorial service. They have another son Adam, now three.